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Finding the Fourth Proportional to 707,867.52, 976,792.32 and 421,457.28

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Solution

The fourth proportional to 707,867.52, 976,792.32 and 421,457.28 is: 581,572.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    707,867.52 : 976,792.32 = 421,457.28 : x
  2. Step 2: Convert to fraction form
    707,867.52/976,792.32 = 421,457.28/x
  3. Step 3: Cross multiply
    707,867.52x = 976,792.32 × 421,457.28
  4. Step 4: Simplify right side
    707,867.52x = 411,676,234,312.09
  5. Step 5: Solve for x
    x = 411,676,234,312.09/707,867.52
  6. Step 6: Final answer
    x = 581,572.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.